High alkaline warewash detergent with enhanced scale control and soil dispersion

Patent metadata

Field	Value
Publication number	US-10745651-B2
Application number	US-201916426828-A
Country	US
Kind code	B2
Filing date	May 30, 2019
Priority date	Nov 11, 2013
Publication date	Aug 18, 2020
Grant date	Aug 18, 2020

Abstract

Detergent compositions and methods of preparing and using the detergent compositions are disclosed. The detergent compositions comprise a polymer system comprising at least one polycarboxylic acid polymer, copolymer, or terpolymer, an alkalinity source comprising an alkali metal carbonate, a nonionic surfactant and water. The detergent compositions are suitable at alkaline pH and reduce or prevent scale formation, improve soil dispersion, and provide effective detergency.

First claim

What is claimed is:

1. A concentrated detergent comprising:
a polymer system comprising at least one polymaleic acid homopolymer, at least one acrylic acid copolymer, and from about 5 wt. % to about 35 wt. % of at least one maleic anhydride/olefin copolymer;
an alkalinity source comprising an alkali metal carbonate;
a nonionic surfactant;
a protease enzyme; and
water;
wherein said detergent has a pH of between about 7 and about 14; and
wherein said detergent prevents hard water scale accumulation while minimizing soil redeposition on a surface in contact with the detergent.

2. The detergent of claim 1 , wherein said polymer system is present in an amount of between about 0.01 wt. % and about 20 wt. % of said detergent.

3. The detergent of claim 1 , wherein said polymaleic acid homopolymer, acrylic acid copolymer, and maleic anhydride/olefin copolymer are present in a ratio of between about 1:1:1 to about 2:2:1.

4. The detergent of claim 1 , wherein said polymaleic acid homopolymer, acrylic acid copolymer, and maleic anhydride/olefin copolymer are present in a ratio between about 1:1:1 to about 3:3:1.

5. The detergent of claim 1 , wherein said polymaleic acid homopolymer is present between about 25 wt. % and about 55 wt. % of the polymer system, said acrylic acid copolymer is present between about 25 wt. % and about 55 wt. % of the polymer system, and said maleic anhydride/olefin copolymer is present between about 5 wt. % and about 35 wt. % of the polymer system.

6. The detergent of claim 1 , wherein said detergent composition comprises between about 0.01 wt. % and about 20 wt. % polymer system, between about 50 wt. % and about 99 wt. % alkalinity source, between about 0 wt. % and about 15 wt. % nonionic surfactant, and between about 0 wt. % and about 20 wt. % water.

7. The detergent of claim 1 , wherein said detergent is substantially free of phosphorus.

8. A method of using a concentrated detergent of claim 1 comprising:
forming a use solution with said concentrated detergent;
contacting a surface with said use solution;
cleaning said surface with said use solution; and
preventing hard water scale accumulation while minimizing soil redeposition on said surface in contact with said use solution.

9. The method of claim 8 , wherein said concentrated detergent is substantially free of phosphorus.

10. The method of claim 8 , wherein said concentrated detergent is present in the use solution between about 200 ppm and about 10,000 ppm.

11. The method of claim 8 , wherein said surface is a ware.

12. The method of claim 8 , wherein said method provides substantially similar cleaning performance to a method employing a phosphorus-containing detergent.

13. The composition of claim 1 , wherein said alkali metal carbonate comprises sodium carbonate, potassium carbonate, bicarbonate and/or sesquicarbonate.

14. The composition of claim 1 , further comprising a stabilizing agent, wherein the stabilizing agent is a protein stabilizing agent and/or a starch-based stabilizing agent.

15. The composition of claim 1 , further comprising a bleach activator, wherein the bleach is a activator tetraacetyl ethylene diamine (TAED), sodium nonanoyloxybenzene sulphonate (SNOBS), glucose pentaacetate (GPA), tetraacetylmethylene diamine (TANG), triacetyl cyanurate, sodium sulphonyl ethyl carbonic acid ester, sodium acetyloxybenzene and/or a mono long-chain acyl tetraacetyl glucose.

16. A concentrated warewash detergent comprising:
between about 0.01 wt. % and about 15 wt. % of a polymer system comprising at least one polymaleic acid homopolymer, at least one polyacrylic acid copolymer, and at least one maleic anhydride/olefin copolymer;
between about 50 wt. % and about 99 wt. % of an alkali metal hydroxide;
between about 0 wt. % and about 15 wt. % of a nonionic surfactant;
a protease enzyme; and
water;
wherein said detergent has a pH between about 7 and about 14 and wherein the at least one polymaleic acid homopolymer, at least one polyacrylic acid copolymer, and at least one maleic anhydride/olefin copolymer are in a ratio of between about 1:1:1 and about 3:3:1; and
wherein said warewash detergent prevents hard water scale accumulation while minimizing soil redeposition on a surface in contact with the detergent.

17. The warewash detergent of claim 16 , wherein said polymer system comprises between about 25 wt. % to about 55 wt. % polymaleic acid homopolymer, between about 25 wt. % to about 55 wt. % polyacrylic acid copolymer, and between about 5 wt. % to about 35 wt. % maleic anhydride/olefin copolymer.

18. The warewash detergent of claim 16 , wherein the detergent contains less than 0.5 wt. % phosphorus.

19. The warewash detergent of claim 16 , wherein said detergent contains at least one additional functional ingredient selected from the group consisting of defoaming agents, anti-redeposition agents, bleaching agents, enzymes, surfactants, solubility modifiers, dispersants, rinse aids, metal protecting agents, stabilizing agents, corrosion inhibitors, additional sequestrants and/or chelating agents, fragrances and/or dyes, rheology modifiers or thickeners, hydrotropes or couplers, buffers, solvents, and combinations thereof.

20. The composition of claim 16 , wherein said alkali metal hydroxide comprises sodium, lithium and/or potassium hydroxide.

Assignees

• Ecolab Usa Inc

Inventors

• Dotzauer David
• Meier Timothy
• Silvernail Carter M
• Mansergh John

Classifications

• C11D1/66 Primary

  Non-ionic compounds {(C11D1/002, C11D1/004, C11D1/008 take precedence)} · CPC title

• C11D3/10

  Carbonates {; Bicarbonates} · CPC title

• C11D3/365

  containing carboxyl groups · CPC title

• C11D3/3757 Primary

  (Co)polymerised carboxylic acids, -anhydrides, -esters in solid and liquid compositions · CPC title

• C11D3/3765

  in liquid compositions · CPC title